Adjustable lamp stand



May 2%, 1925. 1,539,804

F. W. ROBINSON ET AL ADJUSTABLE LAMP STAND Filed Sept. 15, 1923 2Sheets-Sheet 1 5W1: 10mm MM 12 W INVENT RS ATTORNEY May 26, 1925.1,539,804

F. w. ROBINSON ET AL ADJUSTABLE LAMP STAND Filed Sept. 15, 1923 2Sheets-Sheet 2 INVENTORS ATTORNEY Patented May 26, 192 5.

UNITED STATES'PATENT OFFICE.

FREDERIC W. ROBINSON AND KENNETH V.

KNAPP, F NEWARK, NEW JERSEY, AS-

SIGNORS TO HANOVIA CHEMICAL AND MFG. 00., 0F NEWARK, NEW JERSEY, A COR-PORATION OF NEW JERSEY.

ADJUSTABLE LAMP STAND.

Application filed September 15, 1923. Serial No. 662,806

To all whom it may concern:

Be it known that we, Fnnnmuo W. ROBIN- SON and KENNETH V. KNArr, bothcitizens of the United States, and residents of Newark, in the county ofEssex and State of New Jersey. have invented certain new and usefulImprovements in Adjustable Lamp Stands, of which the following is aspecification.

This invention relates to improvements in to types adapted to stands andparticularly adjustably support electric lamps, as used for scientificand medical purposes v One of the objects of the invention is to providea stand com post carrying a rotatable and vertically adjustable sleeveprovided with clamping means and having an angularly adjustable bracketin which operates a transverse slide carrying the lamp head support.

Another purpose is to produce a device for positively actuating theslide into desired adjustment and locking the same when such adjustmenthas been attained, means also being provided forrigidly clamping thebracket in any angular adjustment relative to the post.

A further aim is in the provision of an inclinable lamp support .havingefficient clamping means to retain its angular adjustment and providedwith a cradle or socket having inreaching, spring actuated clamps forautomatically engaging the lamp used in connection therewith.

Supplementary to the foregoing objects are the provision of means-forcounterbalancing the weight of the lamp. said means being eitherengageable to the lamp direct or the bracket at the sleeve as preferred,and associated with the counterweight are means to prevent entanglementof the flexible connecting element used,- irrespective of the positionof parts.

Still further objects are to provide an apparatus that can be usedeither for rightor left hand operations, in which adjustments can bemade by the use of one hand only, and further, to produce a device thatcan be cheaply and economically manufactured.

These and other objects, unspecified but posed of an upright apparentfurther on, are accomplished as hereafter described and shown in theaccompanying drawings, forming a material part I of this disclosure, andin which Figure 1 is a front elevational view, showing an embodimentofthe invention as completely assembled for operating.

Figure 2 is a side view of the same showing the parts in mid position.

Figure 3 is a fragmentary perspective view of the sleeve carried, armsupport bracket and adjustable clamp devices used therewith, drawn to anenlarged scale.

Figure 4 is a longitudinal sectional view taken through the center ofthesame, in the plane of the bracket clamp axis.

Figure 5 is a similar sectional view of the sleeve taken in a plane at aright angle to Figure 4. I

Figure 6 is a fragmentary longitudinal sectional view taken through theupper part of the tubular post. I

Figure 7 is a sectional view of the lamp head support, showing itsautomatic and manually adjustable clamp features.

Figure 8 is aside elevational view of the same, showing the support barconnection.

As shownin the drawings the apparatus is composed of a base, its hubhaving legs 16, preferably three in number, equally spaced and providedat their extremities with casters 17 facilitating its movement overlevel surfaces.

Rigidly fixed upright in the hub 15 is a tubular post 18 extending toany desired height and surmounted at its top'by a throttled cap 19, itsupper, outer surface 20 presenting a parabolic curve blending into thecentral conical cavity 21, enlarged as at 22 and in open communicationwith the interior of the" post.

A cord or like flexible element '23 passes freely through the opening inthe cap, its inner end being secured to a counterweight 24 movablewithin the post and its outer end having a clip 25 engageable with partsto be wholly or partially supported as hereafter describe It is to benoted that the bi ht of the cord in assing over the arabo icall curvedsur ace 20 is supported with very 'ttle friclar tion and it is found byexperience that the cord cannot become entangled, fouled or in any wayrendered unable to perform its function under the most severe tests whensuch device is used.

Engaged on the post 18 is a freely fitting sleeve 26 having an annularchamber 27 in 'which 0 crate a pair of opposed fiat springs left hand aspreferred or more convement,

"due to the interposition of the springs the post is not marred ordisfigured, even'if the screw be forced tightly inward, the function ofthe springs being mainly that of a gib or cushionm element.

Extending laterally outward from the collar 26, at a point near itslower end and at a right angle to the bosses 31, is a larger diameteredboss 32 having a fiat level surface 33 from which projects an integralstud 34, its end 35 being squared to receive a washer-like plate 36having a similarly shaped opening.

The stud is drilled and tapped to receive a knurled head clamp screw 37adapted to press the plate 36 forcibly towards the surace 33, theplate'impinging against a lug 38, forming part of a bracket 39, andbored to fit the stud 34 on which it is revolubly mounted.

Intermediate the inner face of the lug 38 and outer face 33 of thesleeve boss, is inter-' posed a series of friction plates arranged inrouped alternating order, one group 40 bemg constrained to the boss 32by a pin 41,

and the other group 42 being held by a simiin 43 to the lug 38. us whenthe screw 37 is slackened, the

i bracket 39 may be rotated on the stud 34 nearly a full turn, or untilthe pins 41 and being understood that both pins pass freely throughperipheral projec tions on the plates 40 and 42 as shown; on

the contrary when the clamp screw is set up,

the several alternatingly arranged frictlon lates are pressed intoforcible contact, holdmg the bracket 39 rigidly to the sleeve.

The bracket 39 extends in opposite directions past the base of the boss32 and contains a longitudinal recess suited to guide and support arectangular tube 44, which, together with a toothed rack 45, rigidlysecured to the tube, is freely slidable therein.

Meshingwith the teeth of the rack 45 is a i spur pinion 46 mountedbetween lugs 47 and 48 extending from the bracket 39, opposite 30,interchangeable in either 52 the boss 32, the pinion being slidinglyengaged on a polygonal spindle 49 rotatable in the lugs and having astem 50 extending through the lug 48, this stem being fixed in a knob51, below and in register with the head of the screw 37.

A round boss on the face'of the lug-48 contains a concentric rowof holes52 and fixed in the inner face of the knob 51 is a single pin 53engageable in any of the holes To operate the rack the knob 51 is drawnoutwardly to clear the pin '53, the spindle sliding through the pinionand lug 47 until its limit of movement has been reachedat the bottom ofthe recess 48 in the lug 48, whereupon rotating the knob 51, the 'plnionwill be turned, transmitting longitudinal motion to the tube and rack,which, as will later be seen, constitute a support bar.

When this bar has been moved in the bracketto secure the desiredadjustment, the knob is pressed inwardly and the pin 53 engagcd in theclosest adjacent hole, locking the bar from further longitudinalmovement.

It is obvious that the cross section of the spindle 49 may be as shownor otherwise, its function being to transmit rotary motion to thepinionand permit necessary longit'udi nal movement in looking or unlocking theknob 51-without disengaging the pinion.

In order to prevent excessive movement of the elements 44 and 45, a stopplug 54 is inserted and fastened in one end of the tube 44, this plugmaking contact with the end of the bracket, but obviously another formof limit stop may be substituted.

At the opposite or front end of the bar is rigidly fastened an arm 55acting as a stop and extending in alinement with the tube andterminating in forks 56, thru which passes a rod 57 having a threadedend engaging a nut 58, held from rotation by a pin: 59; the other end ofthe rod is integral'with or rigid in a knurled clamp head 60, byrotation of which the forks may be forced towards each other. v

Entering, between the forks is a' tenon 61, rotatable on the rod 57 andhaving a D111- rality of transversely drilled holes in which areenteredrods 62 of any preferred fric-. tional material, as fiber,extendingslightly outward soas to make direct contact with theinnerfaces of the forks and by which the tenon may be clamped. a

This tenon extends from a clutch head 63, the central flat portion 64 ofwhich is in register with the tenon and gradually increased in width,its upper edge having a fiat bead 65,v

The lower part of thehead contains opposed lateral recesses 66 curvedand suited upper members 69 extending above the flat bead 65, forming asocket adapted to engage a lamp body, holding the same securely butre-movably on the stud. each independently These clamps are pressedtoward the head element 64 by coiled compression sprlngs 70 fitting 1nrecesses 71 in the outer sides of the elements 68,. the outer ends ofthe springs abutting respectively the head 72 and nut 73 of a bolt 74.passing through the head element 64:-

one or both of the clamps moving on their rockers 67. v i

The purpose of this clamp socket is to hold the lamp head firmly andprovide means whereby the same can be tilted at any preferredinclination by the knob 60.

Such lamps are usually cooled by water circulation and for this purposehave attached to them flexible pipes 76 and 77, re-

spectiyely inlet and outlet, connecting with a supply source anddischarge.

A cable 78 for supplying current to the lamp is arranged substantiallyparallel to the tubes and over them, these three elements normallyextending rearwa-rdly over the curved upper surface of the lug 38 andare prevented from falling ofl" by guard 79 formed at the upper portionof the plate 36, .said plate being reduced in width and provided with anoutturned extension 80.

The clip 25. carried at the free end of the eounterbalancing cord. isengageable with the extension 80, or it may be engaged with the handleelement 102 of the lamp head as shown in Figures 1 and 2.

From the foregoing it will be clear that the lamp head 100 may be easilyengaged in the socket in a firm and secure manner or removed therefromat will, and when. disengaged its weight is taken by thecounterbalancing device direct.

It is further apparent that the lamp head socket can be inclined on theaxis 57 and firmly clamped when the desired adjustment is obtained.

In addition the lamp head may be extended or retracted by manipulatingthe knob 51 and also looked thereby in a positive manner.

The lamp support bar 44 may beheld at any desired angle or turned nearlyvertical and rigidly clamped in such adjustment, while the sleeve 26 canbe rotated on the post, raised or lowered and also rigidly clamped inany desired position, these several devices rendering the lampuniversally adjustable and applicable in practice in directing the raysas may be desired.

Although we have described our improvements with considerable detail andwith respect to certain particular forms of our invention, we do notdesire to be limited to I such details since many changes andmodifications may well be made without departing from the spirit andscope of our invention in its broadestaspect.

Having thus described our invention, what we claim as new desire tosecure by Letters Patent, is I 1. A therapeutical lamp stand comprisinga castored base, an upright fixed therein, a sleeve slidable onsaidupright, said sleeve having an annular chamber. spring grip strips fixedin opposite sides of the chamber, means for pressing either of saidstrips into forcible clamping engagement with said upright, lampsupporting means adjustably carried on said, sleeve, an electriccableconnecting with said lamp, and resilient means guiding said cablej 2.IA-therapeutical lamp stand comprising a c-as'tored, base, an upright fixedtherein, asleeve slidable'on said upright, means for clamping saidsleeve to said upright at any point along the entire'length thereof, abracket pivoted on.jone side v0t said sleeve to extend outwardlytherefrom, means for clamping said bracket in angular adjustmentrelative to the axis of saidsleeve. a rigid tubular lamp supporting armof rectangular cross section movable lengthwise in said carried on saidsleeve for supporting and bracket. means to adjust said arm lengthwisein the bracket, and means for positively locking said arm. said'lockingmeans being combined with the adjusting means.

A therapeutical lamp stand comprising i a; castored-base, a straighttubular upright fixed therein, a sleeve slidable on said upright fromend to end thereof, means for .ad-

justablysecuring said sleeve on said upright, said sleeve having alaterally extendingstud, a brac-ket pivotallv mounted on said stud, aplurality of friction washer plates on said stud interposed between saidsleeve and bracket, said plates being secured in alternate relationrespectively to the sleeve and bracket, hand operated means for clampingsaid plates to prevent relative rotation of the alternate plates and'tohold saidbracket' in adjustment, and a hollow rectangular lamp carryingarm movably supported in said bracket.

4. A therapeutical lamp stand comprising a movable base, a hollowupright fixed therein, a sleeve adjustable lengthwise on said upright,an arm-adjustable lengthwise in said sleeve, a lampatione end of saidarm, a weight freely movable in said upright, a flexible cord connectingsaid weight with means for clamping said gib against said upright toprevent motion ofthe sleeve, a

' bracket adjustably rotatable on the side of bar in said bracket, meansfor actuating said bar, means for positively locking said bar, stops onthe ends ofisaid bar, and a clamp head carried at one end of said bar. Y7

6. A therapeutical lamp stand comprising a movable base, a hollowupright fixed there said sleeve, a rack in, a sleeve slidable androtatable on the upright, a flexible gib in said sleeve, means forclamping said gib against said upright to prevent,motion of the sleeve,a bracket adjustably rotatable on the side of said sleeve, a rack bar insaidvbracket, means for actuating said bar, means for positively lockingsaid bar, a stop at one end ofsaid bar, a fork at the other end, and'alamp carrying socket pivoted in said fork.

7. A therapeutical lamp stand comprising a base, a'post fixed therein,.a bracket adjustable on said post, said bracketbeing inclinable, a rackbar in said bracket, a pinion engaging said bar, a knob for rotatingsaid pinion, means controlled by said knob for locking the pinion, alamp head carried at one end of said'bar, and means for inclin ing saidhead relative to said bar.

8. A therapeut-ical lamp stand comprising a base, a post fixed therein,a bracket adjustable on said 0st, a bar slidable in said bracket, meansor actuating said bar, a fork atone end of the bar, a lamp head socket,a tenon on said socket pivoted in said fork, frictional elements in saidtenon, and means for clamping the fork on said friction elements toprevent movement of said socket.

9. A therapeutical lamp stand comprising a base, a post fixed verticallytherein, a

sleeve adjustable on said post,a bracket pivoted on said sleeve at theside thereo a bar slidable in the bracket, means for actuating andcontrolling the movement of said bar, a lamp head socket inclinablyengaged on one end of said bar, opposed spring ac tuated meansassociated with said socket adapted to automatically engage and clampthe lamp head, said means maintaining the head in an upright position.

10. The combination with a lamp having a body element of substantialovoidal cross section, of a snap socket receptive of said lamp element,said socket having a fixed central web beaded on its upper surface toact as a seat for said lamp element, a pair of opposed clamps rockinglyengaged on said web at their lower ends, their upper ends being suitedto receive said body element above the bead, and a spring in each clampurging its upper end inwardly.

11. A lamp stand comprising a base, a hollow standard, a lamp head,means slidable and rotatable on said standard to adjustably support thelamp head,fa counterweight for said lamp, said counter-weight beinfreely contained in said standard, a flexible connection between saidlamp head and said counter-weight, and a hollow cap fixed on saidstandard through which said connection passes, said cap having aparabolically curved surface against which the connection makes contact.

12. A lamp stand having a standard, an

arm adjustably connected thereon, a lamp.

head having rear extensions, one of said extensions acting as a handleby which the head can be maneuvered, the other extension being ofelliptical cross section, its longer axis being in ahorizontal plane,and a pair of opposed clamps on one end of said arm, said clamps beingautomatically engageable with the second named extension upon theapplication of moderate pressure. This specification signed andwitnessed this 6th day of September, 1923.

W. ROBINSON.

FREDERIC KENNETH V. KNAPP. Witnesses:

GEORGE H. LAMBERT, FERDINAND Now.

